1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/style/nsStyleCoord.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,347 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/* representation of length values in computed style data */
1.10 +
1.11 +#include "nsStyleCoord.h"
1.12 +#include "mozilla/HashFunctions.h"
1.13 +
1.14 +nsStyleCoord::nsStyleCoord(nsStyleUnit aUnit)
1.15 + : mUnit(aUnit)
1.16 +{
1.17 + NS_ASSERTION(aUnit < eStyleUnit_Percent, "not a valueless unit");
1.18 + if (aUnit >= eStyleUnit_Percent) {
1.19 + mUnit = eStyleUnit_Null;
1.20 + }
1.21 + mValue.mInt = 0;
1.22 +}
1.23 +
1.24 +nsStyleCoord::nsStyleCoord(int32_t aValue, nsStyleUnit aUnit)
1.25 + : mUnit(aUnit)
1.26 +{
1.27 + //if you want to pass in eStyleUnit_Coord, don't. instead, use the
1.28 + //constructor just above this one... MMP
1.29 + NS_ASSERTION((aUnit == eStyleUnit_Enumerated) ||
1.30 + (aUnit == eStyleUnit_Integer), "not an int value");
1.31 + if ((aUnit == eStyleUnit_Enumerated) ||
1.32 + (aUnit == eStyleUnit_Integer)) {
1.33 + mValue.mInt = aValue;
1.34 + }
1.35 + else {
1.36 + mUnit = eStyleUnit_Null;
1.37 + mValue.mInt = 0;
1.38 + }
1.39 +}
1.40 +
1.41 +nsStyleCoord::nsStyleCoord(float aValue, nsStyleUnit aUnit)
1.42 + : mUnit(aUnit)
1.43 +{
1.44 + if (aUnit < eStyleUnit_Percent || aUnit >= eStyleUnit_Coord) {
1.45 + NS_NOTREACHED("not a float value");
1.46 + Reset();
1.47 + } else {
1.48 + mValue.mFloat = aValue;
1.49 + }
1.50 +}
1.51 +
1.52 +bool nsStyleCoord::operator==(const nsStyleCoord& aOther) const
1.53 +{
1.54 + if (mUnit != aOther.mUnit) {
1.55 + return false;
1.56 + }
1.57 + switch (mUnit) {
1.58 + case eStyleUnit_Null:
1.59 + case eStyleUnit_Normal:
1.60 + case eStyleUnit_Auto:
1.61 + case eStyleUnit_None:
1.62 + return true;
1.63 + case eStyleUnit_Percent:
1.64 + case eStyleUnit_Factor:
1.65 + case eStyleUnit_Degree:
1.66 + case eStyleUnit_Grad:
1.67 + case eStyleUnit_Radian:
1.68 + case eStyleUnit_Turn:
1.69 + case eStyleUnit_FlexFraction:
1.70 + return mValue.mFloat == aOther.mValue.mFloat;
1.71 + case eStyleUnit_Coord:
1.72 + case eStyleUnit_Integer:
1.73 + case eStyleUnit_Enumerated:
1.74 + return mValue.mInt == aOther.mValue.mInt;
1.75 + case eStyleUnit_Calc:
1.76 + return *this->GetCalcValue() == *aOther.GetCalcValue();
1.77 + }
1.78 + NS_ABORT_IF_FALSE(false, "unexpected unit");
1.79 + return false;
1.80 +}
1.81 +
1.82 +uint32_t nsStyleCoord::HashValue(uint32_t aHash = 0) const
1.83 +{
1.84 + aHash = mozilla::AddToHash(aHash, mUnit);
1.85 +
1.86 + switch (mUnit) {
1.87 + case eStyleUnit_Null:
1.88 + case eStyleUnit_Normal:
1.89 + case eStyleUnit_Auto:
1.90 + case eStyleUnit_None:
1.91 + return mozilla::AddToHash(aHash, true);
1.92 + case eStyleUnit_Percent:
1.93 + case eStyleUnit_Factor:
1.94 + case eStyleUnit_Degree:
1.95 + case eStyleUnit_Grad:
1.96 + case eStyleUnit_Radian:
1.97 + case eStyleUnit_Turn:
1.98 + case eStyleUnit_FlexFraction:
1.99 + return mozilla::AddToHash(aHash, mValue.mFloat);
1.100 + case eStyleUnit_Coord:
1.101 + case eStyleUnit_Integer:
1.102 + case eStyleUnit_Enumerated:
1.103 + return mozilla::AddToHash(aHash, mValue.mInt);
1.104 + case eStyleUnit_Calc:
1.105 + Calc* calcValue = GetCalcValue();
1.106 + aHash = mozilla::AddToHash(aHash, calcValue->mLength);
1.107 + if (HasPercent()) {
1.108 + return mozilla::AddToHash(aHash, calcValue->mPercent);
1.109 + }
1.110 + return aHash;
1.111 + }
1.112 + NS_ABORT_IF_FALSE(false, "unexpected unit");
1.113 + return aHash;
1.114 +}
1.115 +
1.116 +void nsStyleCoord::Reset()
1.117 +{
1.118 + mUnit = eStyleUnit_Null;
1.119 + mValue.mInt = 0;
1.120 +}
1.121 +
1.122 +void nsStyleCoord::SetCoordValue(nscoord aValue)
1.123 +{
1.124 + mUnit = eStyleUnit_Coord;
1.125 + mValue.mInt = aValue;
1.126 +}
1.127 +
1.128 +void nsStyleCoord::SetIntValue(int32_t aValue, nsStyleUnit aUnit)
1.129 +{
1.130 + NS_ASSERTION((aUnit == eStyleUnit_Enumerated) ||
1.131 + (aUnit == eStyleUnit_Integer), "not an int value");
1.132 + if ((aUnit == eStyleUnit_Enumerated) ||
1.133 + (aUnit == eStyleUnit_Integer)) {
1.134 + mUnit = aUnit;
1.135 + mValue.mInt = aValue;
1.136 + }
1.137 + else {
1.138 + Reset();
1.139 + }
1.140 +}
1.141 +
1.142 +void nsStyleCoord::SetPercentValue(float aValue)
1.143 +{
1.144 + mUnit = eStyleUnit_Percent;
1.145 + mValue.mFloat = aValue;
1.146 +}
1.147 +
1.148 +void nsStyleCoord::SetFactorValue(float aValue)
1.149 +{
1.150 + mUnit = eStyleUnit_Factor;
1.151 + mValue.mFloat = aValue;
1.152 +}
1.153 +
1.154 +void nsStyleCoord::SetAngleValue(float aValue, nsStyleUnit aUnit)
1.155 +{
1.156 + if (aUnit == eStyleUnit_Degree ||
1.157 + aUnit == eStyleUnit_Grad ||
1.158 + aUnit == eStyleUnit_Radian ||
1.159 + aUnit == eStyleUnit_Turn) {
1.160 + mUnit = aUnit;
1.161 + mValue.mFloat = aValue;
1.162 + } else {
1.163 + NS_NOTREACHED("not an angle value");
1.164 + Reset();
1.165 + }
1.166 +}
1.167 +
1.168 +void nsStyleCoord::SetFlexFractionValue(float aValue)
1.169 +{
1.170 + mUnit = eStyleUnit_FlexFraction;
1.171 + mValue.mFloat = aValue;
1.172 +}
1.173 +
1.174 +void nsStyleCoord::SetCalcValue(Calc* aValue)
1.175 +{
1.176 + mUnit = eStyleUnit_Calc;
1.177 + mValue.mPointer = aValue;
1.178 +}
1.179 +
1.180 +void nsStyleCoord::SetNormalValue()
1.181 +{
1.182 + mUnit = eStyleUnit_Normal;
1.183 + mValue.mInt = 0;
1.184 +}
1.185 +
1.186 +void nsStyleCoord::SetAutoValue()
1.187 +{
1.188 + mUnit = eStyleUnit_Auto;
1.189 + mValue.mInt = 0;
1.190 +}
1.191 +
1.192 +void nsStyleCoord::SetNoneValue()
1.193 +{
1.194 + mUnit = eStyleUnit_None;
1.195 + mValue.mInt = 0;
1.196 +}
1.197 +
1.198 +// accessors that are not inlined
1.199 +
1.200 +double
1.201 +nsStyleCoord::GetAngleValueInRadians() const
1.202 +{
1.203 + double angle = mValue.mFloat;
1.204 +
1.205 + switch (GetUnit()) {
1.206 + case eStyleUnit_Radian: return angle;
1.207 + case eStyleUnit_Turn: return angle * 2 * M_PI;
1.208 + case eStyleUnit_Degree: return angle * M_PI / 180.0;
1.209 + case eStyleUnit_Grad: return angle * M_PI / 200.0;
1.210 +
1.211 + default:
1.212 + NS_NOTREACHED("unrecognized angular unit");
1.213 + return 0.0;
1.214 + }
1.215 +}
1.216 +
1.217 +nsStyleSides::nsStyleSides()
1.218 +{
1.219 + memset(this, 0x00, sizeof(nsStyleSides));
1.220 +}
1.221 +
1.222 +bool nsStyleSides::operator==(const nsStyleSides& aOther) const
1.223 +{
1.224 + NS_FOR_CSS_SIDES(i) {
1.225 + if (nsStyleCoord(mValues[i], (nsStyleUnit)mUnits[i]) !=
1.226 + nsStyleCoord(aOther.mValues[i], (nsStyleUnit)aOther.mUnits[i])) {
1.227 + return false;
1.228 + }
1.229 + }
1.230 + return true;
1.231 +}
1.232 +
1.233 +void nsStyleSides::Reset()
1.234 +{
1.235 + memset(this, 0x00, sizeof(nsStyleSides));
1.236 +}
1.237 +
1.238 +nsStyleCorners::nsStyleCorners()
1.239 +{
1.240 + memset(this, 0x00, sizeof(nsStyleCorners));
1.241 +}
1.242 +
1.243 +bool
1.244 +nsStyleCorners::operator==(const nsStyleCorners& aOther) const
1.245 +{
1.246 + NS_FOR_CSS_HALF_CORNERS(i) {
1.247 + if (nsStyleCoord(mValues[i], (nsStyleUnit)mUnits[i]) !=
1.248 + nsStyleCoord(aOther.mValues[i], (nsStyleUnit)aOther.mUnits[i])) {
1.249 + return false;
1.250 + }
1.251 + }
1.252 + return true;
1.253 +}
1.254 +
1.255 +void nsStyleCorners::Reset()
1.256 +{
1.257 + memset(this, 0x00, sizeof(nsStyleCorners));
1.258 +}
1.259 +
1.260 +// Validation of NS_SIDE_IS_VERTICAL and NS_HALF_CORNER_IS_X.
1.261 +#define CASE(side, result) \
1.262 + static_assert(NS_SIDE_IS_VERTICAL(side) == result, \
1.263 + "NS_SIDE_IS_VERTICAL is wrong")
1.264 +CASE(NS_SIDE_TOP, false);
1.265 +CASE(NS_SIDE_RIGHT, true);
1.266 +CASE(NS_SIDE_BOTTOM, false);
1.267 +CASE(NS_SIDE_LEFT, true);
1.268 +#undef CASE
1.269 +
1.270 +#define CASE(corner, result) \
1.271 + static_assert(NS_HALF_CORNER_IS_X(corner) == result, \
1.272 + "NS_HALF_CORNER_IS_X is wrong")
1.273 +CASE(NS_CORNER_TOP_LEFT_X, true);
1.274 +CASE(NS_CORNER_TOP_LEFT_Y, false);
1.275 +CASE(NS_CORNER_TOP_RIGHT_X, true);
1.276 +CASE(NS_CORNER_TOP_RIGHT_Y, false);
1.277 +CASE(NS_CORNER_BOTTOM_RIGHT_X, true);
1.278 +CASE(NS_CORNER_BOTTOM_RIGHT_Y, false);
1.279 +CASE(NS_CORNER_BOTTOM_LEFT_X, true);
1.280 +CASE(NS_CORNER_BOTTOM_LEFT_Y, false);
1.281 +#undef CASE
1.282 +
1.283 +// Validation of NS_HALF_TO_FULL_CORNER.
1.284 +#define CASE(corner, result) \
1.285 + static_assert(NS_HALF_TO_FULL_CORNER(corner) == result, \
1.286 + "NS_HALF_TO_FULL_CORNER is wrong")
1.287 +CASE(NS_CORNER_TOP_LEFT_X, NS_CORNER_TOP_LEFT);
1.288 +CASE(NS_CORNER_TOP_LEFT_Y, NS_CORNER_TOP_LEFT);
1.289 +CASE(NS_CORNER_TOP_RIGHT_X, NS_CORNER_TOP_RIGHT);
1.290 +CASE(NS_CORNER_TOP_RIGHT_Y, NS_CORNER_TOP_RIGHT);
1.291 +CASE(NS_CORNER_BOTTOM_RIGHT_X, NS_CORNER_BOTTOM_RIGHT);
1.292 +CASE(NS_CORNER_BOTTOM_RIGHT_Y, NS_CORNER_BOTTOM_RIGHT);
1.293 +CASE(NS_CORNER_BOTTOM_LEFT_X, NS_CORNER_BOTTOM_LEFT);
1.294 +CASE(NS_CORNER_BOTTOM_LEFT_Y, NS_CORNER_BOTTOM_LEFT);
1.295 +#undef CASE
1.296 +
1.297 +// Validation of NS_FULL_TO_HALF_CORNER.
1.298 +#define CASE(corner, vert, result) \
1.299 + static_assert(NS_FULL_TO_HALF_CORNER(corner, vert) == result, \
1.300 + "NS_FULL_TO_HALF_CORNER is wrong")
1.301 +CASE(NS_CORNER_TOP_LEFT, false, NS_CORNER_TOP_LEFT_X);
1.302 +CASE(NS_CORNER_TOP_LEFT, true, NS_CORNER_TOP_LEFT_Y);
1.303 +CASE(NS_CORNER_TOP_RIGHT, false, NS_CORNER_TOP_RIGHT_X);
1.304 +CASE(NS_CORNER_TOP_RIGHT, true, NS_CORNER_TOP_RIGHT_Y);
1.305 +CASE(NS_CORNER_BOTTOM_RIGHT, false, NS_CORNER_BOTTOM_RIGHT_X);
1.306 +CASE(NS_CORNER_BOTTOM_RIGHT, true, NS_CORNER_BOTTOM_RIGHT_Y);
1.307 +CASE(NS_CORNER_BOTTOM_LEFT, false, NS_CORNER_BOTTOM_LEFT_X);
1.308 +CASE(NS_CORNER_BOTTOM_LEFT, true, NS_CORNER_BOTTOM_LEFT_Y);
1.309 +#undef CASE
1.310 +
1.311 +// Validation of NS_SIDE_TO_{FULL,HALF}_CORNER.
1.312 +#define CASE(side, second, result) \
1.313 + static_assert(NS_SIDE_TO_FULL_CORNER(side, second) == result, \
1.314 + "NS_SIDE_TO_FULL_CORNER is wrong")
1.315 +CASE(NS_SIDE_TOP, false, NS_CORNER_TOP_LEFT);
1.316 +CASE(NS_SIDE_TOP, true, NS_CORNER_TOP_RIGHT);
1.317 +
1.318 +CASE(NS_SIDE_RIGHT, false, NS_CORNER_TOP_RIGHT);
1.319 +CASE(NS_SIDE_RIGHT, true, NS_CORNER_BOTTOM_RIGHT);
1.320 +
1.321 +CASE(NS_SIDE_BOTTOM, false, NS_CORNER_BOTTOM_RIGHT);
1.322 +CASE(NS_SIDE_BOTTOM, true, NS_CORNER_BOTTOM_LEFT);
1.323 +
1.324 +CASE(NS_SIDE_LEFT, false, NS_CORNER_BOTTOM_LEFT);
1.325 +CASE(NS_SIDE_LEFT, true, NS_CORNER_TOP_LEFT);
1.326 +#undef CASE
1.327 +
1.328 +#define CASE(side, second, parallel, result) \
1.329 + static_assert(NS_SIDE_TO_HALF_CORNER(side, second, parallel) == result, \
1.330 + "NS_SIDE_TO_HALF_CORNER is wrong")
1.331 +CASE(NS_SIDE_TOP, false, true, NS_CORNER_TOP_LEFT_X);
1.332 +CASE(NS_SIDE_TOP, false, false, NS_CORNER_TOP_LEFT_Y);
1.333 +CASE(NS_SIDE_TOP, true, true, NS_CORNER_TOP_RIGHT_X);
1.334 +CASE(NS_SIDE_TOP, true, false, NS_CORNER_TOP_RIGHT_Y);
1.335 +
1.336 +CASE(NS_SIDE_RIGHT, false, false, NS_CORNER_TOP_RIGHT_X);
1.337 +CASE(NS_SIDE_RIGHT, false, true, NS_CORNER_TOP_RIGHT_Y);
1.338 +CASE(NS_SIDE_RIGHT, true, false, NS_CORNER_BOTTOM_RIGHT_X);
1.339 +CASE(NS_SIDE_RIGHT, true, true, NS_CORNER_BOTTOM_RIGHT_Y);
1.340 +
1.341 +CASE(NS_SIDE_BOTTOM, false, true, NS_CORNER_BOTTOM_RIGHT_X);
1.342 +CASE(NS_SIDE_BOTTOM, false, false, NS_CORNER_BOTTOM_RIGHT_Y);
1.343 +CASE(NS_SIDE_BOTTOM, true, true, NS_CORNER_BOTTOM_LEFT_X);
1.344 +CASE(NS_SIDE_BOTTOM, true, false, NS_CORNER_BOTTOM_LEFT_Y);
1.345 +
1.346 +CASE(NS_SIDE_LEFT, false, false, NS_CORNER_BOTTOM_LEFT_X);
1.347 +CASE(NS_SIDE_LEFT, false, true, NS_CORNER_BOTTOM_LEFT_Y);
1.348 +CASE(NS_SIDE_LEFT, true, false, NS_CORNER_TOP_LEFT_X);
1.349 +CASE(NS_SIDE_LEFT, true, true, NS_CORNER_TOP_LEFT_Y);
1.350 +#undef CASE
